If The Test Results Are Not What You Expected - HP 8591C User Manual

If You Have a Problem
Other Problems

If the test results are not what you expected

If the test results are not what you expected, it could be because of one of the
following:
Do not exceed the specified power input limit for the analyzer.
C A U T I O N
•I The input signal was not connected.
q
q
4 - 1 4
Ensure that the signal is present at the analyzer input.
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Ensure that the coupler connections and rear-panel connections are
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made. See Chapter 2 for more information.
Ensure proper test signals, line location and field number were specified
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for the Option 107 required tests.
The input signal is too low to be measured.
If the input signal is too low, use a preamplifier to boost the input signal
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(ensure that the voltage and power of the input signal does not exceed
the specified input limits for the analyzer). See "Cable TV Measurement
Specifications and Characteristics" in Chapter 9 for more information
about the minimum carrier level needed.
The wrong tune configuration was selected.
Ensure that the correct tune configuration has been selected.
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If you are not using an external pad, ensure that EXT PAD YES NO
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system" in Chapter 3 for more information.